<template>
  <view class="cart-container" v-if="cart.length!==0">
    <!-- 地址区域-->
    <my-address></my-address>
    <!-- 购物车商品列表的标题区域-->
    <view class="cart-title">
      <!-- 左侧的图标-->
      <uni-icons type="shop" size="18"></uni-icons>
      <!-- 描述文本-->
      <text class="cart-title-text">购物车</text>
    </view>
    <!-- 商品列表区域-->
    <!-- uni-swiper-action 是最外层包裹性质的容器-->
    <uni-swipe-action>
      <block v-for="(goods,index) in cart" :key="index">
        <!-- uni-swipe-action-item 可以为其子节点提供滑动操作的效果。需要通过 options 属性来指定操作按钮的配置信息 -->
        <uni-swipe-action-item :right-options="options" threshold="40"  @click="swiperActionClickHandler($event,goods)">
          <my-goods :goods="goods" :show-radio="true" :show-num="true" @radio-change="radioChangeHandler"
            @num-change="numberChangeHandler"></my-goods>
        </uni-swipe-action-item>    
      </block>
    </uni-swipe-action>
    <!-- 结算区域-->
    <my-settle ></my-settle>
  </view>
  <!-- 空白购物车区域-->
  <view class="empty-cart" v-else>
     <image src="/static/cart_empty@2x.png" class="empty-img"></image>
     <text class="tip-text">空空如也</text>
  </view>
</template>

<script>
  import badgeMix from '@/mixins/tabbar-badge.js'
  import {
    mapState
  } from 'vuex'
  export default {
    mixins: [badgeMix],
    data() {
      return {
          options:[{
            text:'删除',
            style:{
              backgroundColor:'#c00000'
            }
          }]
      };
    },
    computed: {
      ...mapState({
        cart: (state) => state.cart.cart
      })
    },

    methods: {
      //商品勾选状态发生改变
      radioChangeHandler(goods) {
        this.$store.commit('cart/UPDATEGOODSSTATE', goods)
      },
      //商品数量发生变化
      numberChangeHandler(goods) {
        this.$store.commit('cart/UPDATEGOODSCOUNT', goods)
      },
      //点击了滑动操作的按钮 
      swiperActionClickHandler($event,goods){
        console.log($event);
        //删除对应商品
        this.$store.commit('cart/REMOVEGOODBYID',goods.goods_id)
      }
    }
  }
</script>

<style lang="scss">
  .cart-container{
    padding-bottom: 50px;
  
  
  .cart-title {
    height: 40px;
    display: flex;
    align-items: center;
    font-size: 14px;
    padding-left: 5px;
    border-bottom: 1px solid #efefef;

    .cart-title-text {
      margin-left: 10px;
    }
  }
  }
  
  .empty-cart{
      display: flex;
      flex-direction: column;
      align-items: center;
      padding-top: 150px;
      
      .empty-img {
          width: 90px;
          height: 90px;
        }
        
         .tip-text {
            font-size: 12px;
            color: gray;
            margin-top: 15px;
          }
  }
</style>
